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