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