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