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