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