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