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