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