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