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