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