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