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