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