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