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