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