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