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