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