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