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