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