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