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