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