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