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