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