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