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