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