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