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