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