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