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