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