One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,6)(4,13)(5,9)(7,10)(8,12)(11,16)(14,15)(17,18)(19,22)(20,21)(23,25)(24,26)(27,30)(28,31)(29,32)(33,34)(35,39)(36,40)(37,45)(38,42)(41,47)(43,44)(46,48) involution — undirected(1,3)(2,6)(4,5)(7,11)(8,14)(9,13)(10,16)(12,15)(17,19,23,26)(18,24,25,22)(20,27,29,31)(21,28,32,30)(33,35)(34,39)(36,42)(37,43)(38,40)(41,48)(44,45)(46,47)(3,11)(4,12)(6,16)(8,13)(18,25)(20,29)(22,24)(27,31)(33,35,38,40)(34,36,42,39)(37,46,47,43)(41,48,45,44)(1,4)(2,8)(3,5)(6,14)(7,12)(9,16)(10,13)(11,15)(17,20,23,29)(18,21,25,32)(19,27,26,31)(22,30,24,28)(33,35)(34,36)(37,43)(38,40)(39,42)(41,44)(45,48)(46,47)(1,5)(2,9)(3,12)(4,11)(6,8)(7,15)(10,14)(13,16)(17,21)(18,20)(19,28)(22,31)(23,32)(24,27)(25,29)(26,30)(33,36)(34,40)(35,42)(37,44)(38,39)(41,46)(43,45)(47,48) involution — undirected(1,6)(2,3)(4,14)(5,8)(7,16)(9,12)(10,11)(13,15)(17,22,23,24)(18,26,25,19)(20,30,29,28)(21,31,32,27)(33,37)(34,41)(35,43)(36,44)(38,47)(39,48)(40,46)(42,45)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.