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