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