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)(19,23)(20,31)(21,29)(22,27)(24,26)(25,36)(28,33)(30,40)(32,35)(34,45)(37,38)(39,46)(41,43)(42,48)(44,47) involution — undirected(1,3,6,13)(2,7,9,11)(4,12,5,14)(8,15,10,16)(17,19,23,18)(20,32,35,31)(21,29,24,26)(22,38,40,43)(25,33,28,36)(27,41,30,37)(34,42,39,44)(45,47,46,48)(1,4,6,5)(2,8,9,10)(3,12,13,14)(7,15,11,16)(17,20,23,35)(18,25,19,28)(21,33,24,36)(22,39,40,34)(26,32,29,31)(27,44,30,42)(37,48,41,47)(38,46,43,45)(2,9)(7,11)(8,10)(15,16)(17,21,23,24)(18,26,19,29)(20,33,35,36)(22,37,40,41)(25,32,28,31)(27,43,30,38)(34,47,39,48)(42,46,44,45)(1,5,6,4)(2,10,9,8)(3,12,13,14)(7,15,11,16)(17,22,23,40)(18,27,19,30)(20,34,35,39)(21,37,24,41)(25,42,28,44)(26,43,29,38)(31,45,32,46)(33,47,36,48)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.