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