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