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