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