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