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