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