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)(18,25)(19,30)(20,34)(21,36)(22,23)(26,41)(27,29)(28,35)(31,32)(33,38)(37,39)(40,43)(42,44)(45,48) involution — undirected(1,3,7,8)(2,4,11,16)(5,14,6,13)(9,12,10,15)(17,18,24,29)(19,26,33,45)(20,35,21,37)(22,28,23,39)(25,34,27,36)(30,43,38,44)(31,41,32,48)(40,46,42,47)(1,4)(2,8)(3,11)(5,15)(6,12)(7,16)(9,14)(10,13)(17,19)(18,26)(20,31)(21,32)(22,38)(23,30)(24,33)(25,40)(27,42)(28,44)(29,45)(34,46)(35,41)(36,47)(37,48)(39,43) involution — undirected(1,5,7,6)(2,9,11,10)(3,13,8,14)(4,15,16,12)(17,20,22,36,24,21,23,34)(18,27,39,37,29,25,28,35)(19,31,38,47,33,32,30,46)(26,42,43,48,45,40,44,41)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.