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