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