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)(19,21)(20,25)(22,26)(23,27)(24,30)(28,29)(31,32)(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)(17,19,23,30)(18,24,27,21)(20,28,26,32)(22,29,25,31)(33,35)(34,39)(36,42)(37,43)(38,40)(41,48)(44,45)(46,47)(3,11)(4,12)(6,16)(8,13)(20,26)(22,25)(28,32)(29,31)(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)(17,20,23,26)(18,25,27,22)(19,28,30,32)(21,29,24,31)(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)(17,21,23,24)(18,19,27,30)(20,31,26,29)(22,28,25,32)(33,36)(34,40)(35,42)(37,44)(38,39)(41,46)(43,45)(47,48)(1,6)(2,3)(4,14)(5,8)(7,16)(9,12)(10,11)(13,15)(17,22,23,25)(18,26,27,20)(19,29,30,31)(21,28,24,32)(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.