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