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