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