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