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