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