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