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