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