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