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)(19,25)(20,27)(21,28)(22,36)(23,40)(24,30)(26,33)(29,38)(31,44)(32,42)(34,41)(35,46)(37,43)(39,48)(45,47) involution — undirected(1,3)(2,6)(4,10)(5,11)(7,13)(8,9)(12,16)(14,15)(17,19)(18,25)(20,23)(21,34)(22,31)(24,32)(26,29)(27,40)(28,41)(30,42)(33,38)(35,47)(36,44)(37,39)(43,48)(45,46) involution — undirected(1,4,5,12)(2,7,8,14)(3,10,11,16)(6,13,9,15)(17,20)(18,26)(19,23)(21,32)(22,37)(24,34)(25,29)(27,36)(28,43)(30,45)(31,39)(33,38)(35,47)(40,44)(41,48)(42,46)(3,11)(6,9)(10,16)(13,15)(17,20)(18,27)(19,21)(22,33)(23,32)(24,34)(25,28)(26,36)(29,43)(30,41)(31,35)(37,38)(39,47)(40,42)(44,46)(45,48) involution — undirected(2,8)(6,9)(7,14)(13,15)(17,21,24,23)(18,28,30,40)(19,20,32,34)(22,35,39,38)(25,27,42,41)(26,43,45,44)(29,36,46,48)(31,33,37,47)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.