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