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)(17,18,23,26)(19,24,22,32)(20,28,30,27)(21,25,31,29)(1,3,5,8)(2,6,4,7)(9,10,13,14)(11,12,16,15)(17,19,23,22)(18,24,26,32)(20,29,30,25)(21,27,31,28)(9,11)(10,15)(12,14)(13,16)(17,20,22,29,23,30,19,25)(18,21,24,28,26,31,32,27)(3,8)(6,7)(10,14)(11,16)(17,21)(18,25)(19,27)(20,24)(22,28)(23,31)(26,29)(30,32) involution — undirected(1,4,5,2)(3,7,8,6)(9,12,13,15)(10,11,14,16)(18,26)(21,31)(24,32)(27,28)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.