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