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