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