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