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)(19,28)(20,24)(21,26)(22,27)(23,32)(25,36)(29,30)(31,41)(33,35)(34,39)(37,44)(38,46)(40,47)(42,43)(45,48) involution — undirected(1,3)(2,7)(4,11)(5,14)(6,12)(8,15)(9,10)(13,16)(17,18)(19,29)(20,33)(21,25)(22,27)(23,32)(24,35)(26,36)(28,30)(31,45)(34,40)(37,44)(38,43)(39,47)(41,48)(42,46) involution — undirected(17,19,22,30)(18,23)(20,31,34,43)(21,32,36,44)(24,38)(25,28)(26,29)(27,37)(33,42)(35,46,47,48)(39,45)(40,41)(1,4,6,5)(2,8,9,13)(3,11,12,14)(7,15,10,16)(19,30)(20,34)(23,37)(24,39)(28,29)(32,44)(33,40)(35,47)(1,5,6,4)(2,8,9,13)(3,11,12,14)(7,16,10,15)(17,20,21,35,22,34,36,47)(18,24,26,33,27,39,25,40)(19,31,32,46,30,43,44,48)(23,38,29,42,37,45,28,41)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.