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