One vertex per element, one color per generator, with an edge from x to x·s.
(3,6)(4,8)(10,13)(14,16)(17,18,23,20)(19,27,30,24)(21,31,29,25)(22,26,28,32)(1,2)(3,8)(4,6)(5,7)(9,10,12,13)(11,14,15,16)(17,19)(18,24)(20,27)(21,28)(22,29)(23,30)(25,32)(26,31)(1,3)(2,4)(5,6)(7,8)(18,20)(24,27)(25,31)(26,32) involution — undirected(1,2)(3,8)(4,6)(5,7)(17,20,23,18)(19,27,30,24)(21,31,29,25)(22,32,28,26)(1,4,5,8)(2,6,7,3)(17,21,23,29)(18,25,20,31)(19,28,30,22)(24,32,27,26)(1,2)(3,4)(5,7)(6,8)(9,11,12,15)(10,14,13,16)(17,22,23,28)(18,26,20,32)(19,29,30,21)(24,31,27,25)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.