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)(11,16)(12,14)(13,15)(18,22)(19,23)(26,29)(27,31) involution — undirected(2,4)(6,7)(9,11,13,12)(10,14,15,16)(17,18)(19,20)(21,22)(23,24)(3,8)(6,7)(11,12)(14,16)(18,22)(19,23)(25,26)(27,32)(28,29)(30,31) involution — undirected(1,3,5,8)(2,6,4,7)(9,12,13,11)(10,14,15,16)(17,19,21,23)(18,20,22,24)(25,27)(26,30)(28,31)(29,32)(1,4,5,2)(3,7,8,6)(9,10)(11,16)(12,14)(13,15)(17,20)(18,23)(19,22)(21,24)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.