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