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