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