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