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