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