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