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