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