One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,10)(4,8)(5,14)(6,9)(7,13)(11,16)(12,15)(17,18,22,27)(19,30,32,25)(20,33,35,46)(21,28,40,41)(23,39,24,29)(26,38,43,37)(31,36,45,48)(34,44,47,42)(1,3)(2,7)(4,11)(5,12)(6,13)(8,15)(9,10)(14,16)(17,19)(18,25)(20,34)(21,39)(22,32)(23,28)(24,41)(26,36)(27,30)(29,40)(31,38)(33,42)(35,47)(37,45)(43,48)(44,46) involution — undirected(1,4,6,5)(2,8,9,14)(3,11,13,12)(7,15,10,16)(17,20,22,35)(18,26)(19,31)(21,36,40,48)(23,37,24,38)(25,42,30,44)(27,43)(28,34)(29,33)(32,45)(39,46)(41,47)(1,5,6,4)(2,8,9,14)(3,12,13,11)(7,15,10,16)(18,27)(20,35)(21,40)(25,30)(29,39)(31,45)(34,47)(37,38)(3,13)(7,10)(11,12)(15,16)(17,21,24,30,22,40,23,25)(18,28,29,32,27,41,39,19)(20,36,38,44,35,48,37,42)(26,34,33,45,43,47,46,31)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.