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