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