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)(17,18,21,26)(19,28,30,23)(20,32,33,25)(22,24,35,27)(29,37,42,41)(31,38,44,36)(34,40,45,39)(43,46,48,47)(1,3)(2,5)(4,7)(6,8)(9,10)(11,14)(12,13)(15,16)(17,19)(18,23)(20,29)(21,30)(22,31)(24,36)(25,37)(26,28)(27,38)(32,41)(33,42)(34,43)(35,44)(39,46)(40,47)(45,48) involution — undirected(1,3)(2,4)(5,7)(6,8)(10,13)(14,15)(18,24)(20,33)(22,35)(23,36)(25,40)(26,27)(28,38)(29,42)(31,44)(32,39)(37,47)(41,46) involution — undirected(1,4,6,5)(2,3,7,8)(9,11,12,16)(10,14,13,15)(17,20)(18,25)(19,29)(21,33)(22,34)(23,37)(24,39)(26,32)(27,40)(28,41)(30,42)(31,43)(35,45)(36,46)(38,47)(44,48)(1,5,6,4)(2,3,7,8)(19,30)(20,33)(23,28)(25,32)(31,44)(34,45)(36,38)(39,40)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.