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