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