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