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