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