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