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