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