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