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