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