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