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