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