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