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