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