One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,4)(5,6,10,14)(7,15,18,12)(8,13,9,11)(16,19,17,20)(21,22,26,30)(23,31,34,35)(24,29,25,28)(27,33,36,32)(6,11)(7,16)(8,9)(13,14)(17,18)(19,20)(21,23,26,34)(22,27,30,36)(24,33,25,32)(28,35,29,31)(2,4)(5,7)(6,12)(8,16)(9,17)(10,18)(11,19)(13,20)(14,15)(23,32)(24,25)(27,31)(28,29)(33,34)(35,36) involution — undirected(5,8,10,9)(6,13,14,11)(7,16,18,17)(12,20,15,19)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.