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