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