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