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