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