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