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