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