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