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