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