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