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