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