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