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