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