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