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