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