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