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