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