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