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