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)(17,18,23,25)(19,26,20,21)(22,24,31,32)(27,30,28,29)(33,34)(35,37)(36,39)(38,44)(40,42)(41,46)(43,47)(45,48)(4,11)(8,14)(10,15)(12,16)(17,19,23,20)(18,21,25,26)(22,27,31,28)(24,29,32,30)(33,35)(34,40)(36,37)(38,43)(39,42)(41,47)(44,45)(46,48)(2,7)(3,9)(8,14)(10,15)(34,36)(35,42)(41,44)(43,48) involution — undirected(1,3)(2,5)(4,10)(6,9)(7,13)(8,12)(11,15)(14,16)(17,20,23,19)(18,21,25,26)(22,28,31,27)(24,29,32,30)(33,36,39,34)(35,37,42,40)(38,44,46,41)(43,45,48,47)(1,4)(2,8)(3,10)(5,12)(6,11)(7,14)(9,15)(13,16)(17,21)(18,19)(20,25)(22,30)(23,26)(24,28)(27,32)(29,31)(33,37)(34,35)(36,42)(38,45)(39,40)(41,43)(44,48)(46,47) involution — undirected(1,5)(2,3)(4,12)(6,13)(7,9)(8,10)(11,16)(14,15)(17,22,23,31)(18,24,25,32)(19,27,20,28)(21,29,26,30)(33,38,39,46)(34,41,36,44)(35,43,42,48)(37,45,40,47)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.