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