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