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