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