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