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