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