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