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