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