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