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