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