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