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