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