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