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