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