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