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)(17,18,21,25)(19,28,20,23)(22,27,30,26)(24,29,32,31)(2,5)(6,8)(9,11,12,15)(10,13,14,16)(17,19,22,29,21,20,30,31)(18,23,27,24,25,28,26,32)(3,7)(6,8)(17,20)(18,24)(19,21)(22,29)(23,27)(25,32)(26,28)(30,31) involution — undirected(1,3,4,7)(2,6,5,8)(10,14)(13,16)(19,20)(23,28)(24,32)(29,31)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.