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