One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,5)(4,9)(6,11)(7,8)(10,15)(12,14)(13,16)(17,18,23,26)(19,22,25,31)(20,21,24,30)(27,28,29,32)(33,34,38,41)(35,36,43,39)(37,40,46,48)(42,44,47,45)(1,3)(2,5)(4,6)(7,10)(8,15)(9,11)(12,13)(14,16)(17,19)(18,22)(20,27)(21,28)(23,25)(24,29)(26,31)(30,32)(33,35)(34,39)(36,41)(37,42)(38,43)(40,45)(44,48)(46,47) involution — undirected(2,8)(3,10)(6,12)(9,16)(19,25)(22,31)(27,29)(28,32)(33,36,38,39)(34,35,41,43)(37,45,46,44)(40,47,48,42)(1,4)(2,9)(3,12)(5,14)(6,10)(7,13)(8,16)(11,15)(17,20)(18,21)(19,27)(22,28)(23,24)(25,29)(26,30)(31,32)(33,34)(35,36)(37,40)(38,41)(39,43)(42,44)(45,47)(46,48) involution — undirected(1,5,7,15)(2,10,8,3)(4,11,13,14)(6,9,12,16)(17,21)(18,24)(19,28)(20,26)(22,29)(23,30)(25,32)(27,31)(33,35)(34,39)(36,41)(37,42)(38,43)(40,45)(44,48)(46,47)(1,6,7,12)(2,11,8,14)(3,4,10,13)(5,9,15,16)(17,22,23,31)(18,25,26,19)(20,28,24,32)(21,29,30,27)(33,37,38,46)(34,40,41,48)(35,42,43,47)(36,44,39,45)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.