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